Remember that no one is ever rewarded or promoted because of a bad disposition and a negative mental attitude.
If you really examine any well-managed organization, you will find that the people who are most successful are those who are positive and helpful, people who always find the time to offer encouragement and praise when it is deserved. The people who occupy the top positions are almost always happy, enthusiastic people who encourage others to behave in the same way. Yet there are always a few individuals who never seem to get the message and behave as though they can complain their way to the top. There isn’t a single situation in your career, your relationships with others, or in your personal life that benefits from a negative attitude. All will be greatly improved if you make it a practice to approach life in a positive way.